A light was seen reflecting off the house and trees from an unknown source.March 20 approximately 5am while in my hot tub outside on the deck a light reflecting off my house was observed coming from behind my house. It lit up the house roof line and several trees close to the house. It appeared to brighten and rise for only 10 seconds. It appeared almost as bright as a car headlight. Only the reflection of light was seen off the house and trees. No object was observed. This is the second time the same incident has occurred. The previous event was a number of years earlier and was observed by another witness in the room where reflected light came in through the window off the walls and moved up and was gone.